CN101872870B - Rechargeable battery having a current collecting plate - Google Patents

Rechargeable battery having a current collecting plate Download PDF

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Publication number
CN101872870B
CN101872870B CN2010101541957A CN201010154195A CN101872870B CN 101872870 B CN101872870 B CN 101872870B CN 2010101541957 A CN2010101541957 A CN 2010101541957A CN 201010154195 A CN201010154195 A CN 201010154195A CN 101872870 B CN101872870 B CN 101872870B
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CN
China
Prior art keywords
electrode
collector plate
rechargeable battery
terminal
lead
Prior art date
Application number
CN2010101541957A
Other languages
Chinese (zh)
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CN101872870A (en
Inventor
卞相辕
安柄圭
Original Assignee
三星Sdi株式会社
罗伯特-博世有限公司
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Priority to KR1020090034674A priority Critical patent/KR101147171B1/en
Priority to KR10-2009-0034674 priority
Application filed by 三星Sdi株式会社, 罗伯特-博世有限公司 filed Critical 三星Sdi株式会社
Publication of CN101872870A publication Critical patent/CN101872870A/en
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Publication of CN101872870B publication Critical patent/CN101872870B/en

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Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/04Construction or manufacture in general
    • H01M10/0431Cells with wound or folded electrodes
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/20Current conducting connections for cells
    • H01M2/22Fixed connections, i.e. not intended for disconnection
    • H01M2/26Electrode connections
    • H01M2/263Electrode connections overlying wound or folded electrode stacks
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/052Li-accumulators
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/058Construction or manufacture
    • H01M10/0587Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/02Cases, jackets or wrappings
    • H01M2/0202Cases, jackets or wrappings for small-sized cells or batteries, e.g. miniature battery or power cells, batteries or cells for portable equipment
    • H01M2/0217Cases of prismatic shape

Abstract

Disclosed is a rechargeable battery including an electrode assembly having a positive electrode, a negative electrode, and a separator between the positive and negative electrodes. The electrode assembly has rounded ends and a flat portion between the rounded ends, a case containing the electrode assembly, a cap plate coupled to the case, and a terminal electrically connected to the electrode assembly and exposed to an exterior of the electrode assembly. The battery also includes a current collecting plate electrically connecting one of the positive electrode and the negative electrode to a terminal, and welded to an end of the positive electrode or the negative electrode at the curved portion of the electrode assembly.

Description

Rechargeable battery with collector plate

Technical field

Described technology contents relates to a kind of rechargeable battery.In particular to a kind of rechargeable battery with collector plate.

Background technology

Different with the primary cell that can't recharge, rechargeable battery can charge and discharge.The low capacity rechargeable battery has been used to such as mobile phone, kneetop computer and can have taken small portable electronic device such as video camera.High-capacity battery has been widely used as the power supply of CD-ROM drive motor (for example motor of hybrid automobile).

At present, developed the high power rechargeable battery of the nonaqueous electrolytic solution that a kind of use has high-energy-density.This high power rechargeable battery is the big capacity rechargeable battery that comprises a plurality of rechargeable batteries that are connected in series.This high power rechargeable battery can be used on the motor that needs in the powerful equipment with the motor that drives motor vehicle for example etc.

Further, the high capacity cell module generally includes a plurality of rechargeable batteries that are connected in series, and wherein, this rechargeable battery can form cylindrical or square configuration etc.

Prismatic rechargeable battery generally include have positive electrode, the electrode assemblie of negative electrode and the dividing plate between positive and negative electrode.It also can comprise the cover plate that has for housing, the seal casinghousing in the space of hold electrodes assembly and have the terminal hole that the power supply gate terminal is inserted through.Electrode terminal is electrically connected with electrode assemblie, and inserts in the terminal hole to reach outside the housing.

In traditional prismatic rechargeable battery, the lead-in wire lug plate of electrode assemblie and terminal electrical connection is fixed to the side surface in the uncoated zone of electrode assemblie by ultrasonic bonding.Yet when the lead-in wire lug plate was welded to the whole side surface in uncoated zone of electrode assemblie, the volume of electrode assemblie unnecessarily increased.

In addition, in order to allow ultrasonic bonding, the lead-in wire lug plate is thinner usually, thereby ultrasonic wave is sent to uncoated zone.Yet when the lead-in wire lug plate was thinner, its resistance increased, and caused heat to produce thus and output performance decline.

In addition, when rechargeable battery is subjected to impacting, can comes in contact performance between lead-in wire lug plate and electrode assemblie and descend, this can cause interior heat to produce and output reduces.

And when the lead-in wire lug plate was soldered to the side in uncoated zone, the lead-in wire lug plate may not can stably be welded to uncoated zone because uncoated zone is too thin.Especially, the uncoated zone of lithium ion battery is often thinner and fragile, thereby is difficult to adhere to and welding lead lug plate and uncoated zone.

The above-mentioned information in this background parts of being disclosed in only be used for to strengthen the understanding to the background of institute's description technique, and therefore, it is known but do not constitute the information of prior art to those skilled in the art to be included in this country.

Summary of the invention

In an embodiment of the present invention, rechargeable battery can have the electrode assemblie that stably is connected to terminal.

Rechargeable battery comprises according to an exemplary embodiment of the present invention: first electrode, second electrode, in the uncoated zone of first electrode at the place, end of described first electrode, at the place, end of described second electrode second electrode uncoated zone and the dividing plate described first electrode and described second electrode between relative with the uncoated zone of described first electrode.Described electrode assemblie can have curved end and the flat between described curved end.Rechargeable battery can comprise the housing that holds described electrode assemblie, is attached to the cover plate of described housing and is electrically connected to described first electrode and the first terminal that is positioned at the outside of described rechargeable battery.Described rechargeable battery can comprise and is electrically connected described first electrode and described the first terminal and is welded to collector plate in the uncoated zone of described first electrode at one of them place of the described curved end of described electrode assemblie.

Described collector plate can have towards the outstanding protuberance of described electrode assemblie.Described protuberance can be semicircular in shape.

Described collector plate can have sealing wire in the position that described collector plate is welded to described electrode assemblie.Each sealing wire can radially prolong.In addition, described collector plate can have a plurality of protuberances, and each protuberance radially.

Groove can be opposite with described protuberance and corresponding, and the lead member that is electrically connected described the first terminal and described collector plate can have the lead-in wire protuberance that is arranged in described groove.

The end of described collector plate can be arc.Described collector plate can have the ribs of extending above one of them of the described curved end of described electrode assemblie.Described ribs can have the cross section of arcuation.

The lead member that is electrically connected described the first terminal and described collector plate can comprise the welding rib that is welded to described ribs.Described welding rib can have the cross section of arcuation.

Described collector plate can comprise first afflux part at the first end place that is positioned at the uncoated zone of described first electrode and be positioned at the second afflux part at the second end place in the uncoated zone of described first electrode.Described first afflux part can be welded to the described first end in the uncoated zone of described first electrode, and described second afflux part can be welded to the described the second end in the uncoated zone of described first electrode.In addition, described first afflux part can be connected by connecting rod with described second afflux part.

The lead member that is electrically connected described the first terminal and described collector plate can be welded to the center along its length of described connecting rod.The active material of the positive electrode of described electrode assemblie can comprise lithium compound.

According to exemplary embodiment of the present invention, described collector plate is welded to the uncoated zone of first electrode of the bend office of described electrode assemblie, so that collector plate and electrode assemblie can more stably weld in collector plate and the uncoated zone adhesion of first electrode, therefore, terminal can stably be connected with described electrode assemblie.

Description of drawings

Fig. 1 is the perspective view of the rechargeable battery of first exemplary embodiment according to the present invention.

Fig. 2 is the cutaway view along the intercepting of II-II line of Fig. 1.

Fig. 3 is the electrode assemblie of first exemplary embodiment according to the present invention and the decomposition diagram of collector plate.

Fig. 4 is the end view of the collector plate that is welded to electrode assemblie of first exemplary embodiment according to the present invention.

Fig. 5 is the decomposition diagram of collector plate and the lead member of first exemplary embodiment according to the present invention.

Fig. 6 is the sectional perspective view of collector plate and the lead member of second exemplary embodiment according to the present invention.

Fig. 7 is the electrode assemblie of the 3rd exemplary embodiment according to the present invention and the decomposition diagram of collector plate.

Fig. 8 is the perspective view of collector plate and the lead member of the 3rd exemplary embodiment according to the present invention.

The explanation of the Reference numeral of some elements in the indication accompanying drawing

100: rechargeable battery 10: electrode assemblie

11: positive electrode 11a: the uncoated zone of positive electrode

12: negative electrode 12a: the uncoated zone of negative electrode

13: dividing plate 18: flat

19: sweep 21,22: terminal

30: cover plate 34: housing

40,40 ': collector plate 42,42 ': groove

43,43 ': protuberance 45,45 ': ribs

49: sealing wire 50,50 ': lead member

51,51 ': terminal lead part 52,52 ': the afflux lead portion

53,53 ': lead-in wire protuberance 73: the welding rib

82: go up afflux part 83: the lower header part

85: connecting rod

Embodiment

Those skilled in the art hereinafter, embodiments of the invention described with reference to the accompanying drawings, so that can realize the present invention.Yet the present invention can be embodied as variety of way, is not limited to following exemplary embodiment.And identical Reference numeral is indicated same or analogous part in whole specification and accompanying drawing.

Fig. 1 is the perspective view of the rechargeable battery of first exemplary embodiment according to the present invention, and Fig. 2 is the cutaway view of the II-II intercepting along the line of Fig. 1.

Referring to Fig. 1 and Fig. 2, comprise according to the rechargeable battery 100 of first exemplary embodiment: by insulating barrier 13 being placed on the electrode assemblie 10 that coiling forms between positive electrode 11 and the negative electrode 12; The housing 34 of electrode assemblie 10 wherein is installed; Be electrically connected to the positive electrode terminal 21 of electrode assemblie 10; Negative electrode terminal 22; Cover plate 30 with the opening that is attached to housing 34.In some embodiments of the invention, positive electrode 11 can be described as first electrode or second electrode, and negative electrode 12 can be described as the another one in first electrode and second electrode.According to first exemplary embodiment can be square Lithuim rechargeable battery at rechargeable battery 100.

Positive electrode 11 and negative electrode 12 have the main body that is formed by the metal forming thin plate, and comprise the coating zone that wherein is coated with active material and uncoated uncoated regional 11a and the 12a that active material is arranged wherein.At this, positive electrode active substance can comprise lithium compound, and, be the rechargeable battery of lithium ion type according to the rechargeable battery of this exemplary embodiment.

The uncoated regional 11a of positive electrode is positioned at the end along the length direction of positive electrode 11 of positive electrode 11, and the uncoated regional 12a of negative electrode is positioned at the other end along the length direction of negative electrode 12 of negative electrode 12.In addition, as the dividing plate 13 of insulator between positive electrode 11 and negative electrode 12.

Cover plate 30 is thin plate.Be used for injecting electrolytical electrolyte entrance and be formed on cover plate 30, and in case electrolyte is placed in the battery, then seal cover 38 is installed in the electrolyte entrance.In addition, exhaust component 39 is arranged in the cover plate 30, and this exhaust component has the groove that can break when internal pressure reaches predetermined value.

Last liner 25 and lower liner 27 are arranged between cover plate 30 and terminal 21 and 22, thereby with cover plate 30 and terminal 21 and 22 insulation.At this, terminal comprises positive electrode terminal and negative electrode terminal.In some embodiments of the invention, positive electrode terminal can be described as the first terminal or second terminal, and negative electrode terminal can be described as the another one in the first terminal and second terminal.

Lower liner 27 is inserted in the terminal hole, and last liner 25 is arranged on the cover plate 30.Packing ring 24 is arranged on and is used for the buffering fastening force on the liner 25.Nut 29,29 ' is arranged in positive electrode terminal 21 and the negative electrode terminal 22, is used for from the described terminal of top braces.

In the uncoated regional 11a of the positive electrode of electrode assemblie 10, collector plate 40 is by lead member 50 welding and be electrically connected to positive electrode terminal 21.In addition, in the uncoated regional 12a of negative electrode, negative electrode terminal 22 is welded and be electrically connected to second collector plate 40 ' by lead member 50 '.Insulating component 26 is arranged between each and the cover plate 30 in the lead member 50,50 '.Lead member 50,50 ' comprises and is connected respectively to one of them terminal lead part 51,51 ' and be attached to corresponding collector plate 40,40 ' afflux lead portion 52,52 ' of positive electrode terminal 21 and negative electrode terminal 22.And afflux lead portion 52,52 ' comprises lead-in wire protuberance 53,53 ' respectively.

Fig. 3 is according to the electrode assemblie of first exemplary embodiment of the present invention and the decomposition diagram of collector plate.

Referring to Fig. 3, when reeling, be pressed into smooth tabularly according to the electrode assemblie 10 of first exemplary embodiment, therefore, form tabular flat 18 and be formed at the sweep 19 of the respective end bending of flat 18.

Each collector plate 40,40 ' includes tight adhesion to the groove 42 of the sweep of electrode assemblie 10,42 ' and protuberance 43,43 '.Each protuberance 43,43 ' is welded to the respective side portion of electrode assemblie 10 then.Ribs 45,45 ' is outwards outstanding from each collector plate 40,40 ' edge.

For corresponding with sweep 19, each collector plate 40,40 ' top all are arcs, and each collector plate 40,40 ' side are from this arch section straight line continuity.Each ribs 45,45 ' forms along arch section and the side that is connected to this arch section.Yet each ribs 45,45 ' all is not formed on each collector plate 40,40 ' bottom.When the last sweep 19 of electrode assemblie is inserted in each collector plate 40,40 ', so each ribs 45,45 ' adheres to the outer circumferential surface of electrode assemblie 10.Therefore, each ribs 45,45 ' supports collector plate 40,40 ' with respect to electrode assemblie 10 from last, left and right direction, so that each collector plate 40,40 ' all can be installed to correct position.In addition, can prevent each collector plate 40,40 ' and corresponding uncoated regional 11a and 12a between since vibrations or the contact performance that causes of vibration reduce.

Adhere to the corresponding side end surface of uncoated regional 11a and 12a towards the outstanding protuberances 43,43 ' of electrode assemblie 10, with fixing corresponding protuberance 43,43 ' and uncoated regional 11a and 12a.When adhering to electrode assemblie 10, each protuberance 43,43 ' carries out laser welding then.At this, side end surface refers to uncoated regional 11a that making of electrode assemblie 10 pile up and the cross section of passing through is exposed in the end of 12a.Protuberance 43,43 ' has the approximate half-circular shape, thereby has the cross section that the straight line by the respective end that connects arc forms.

As shown in Figure 4, protuberance 43 adheres to side end surface, particularly adheres to the sweep 19 of electrode assemblie 10, and fixes by laser welding.In the case, the sealing wire 49 that is formed in the groove 42 extends along the vertical radial direction of the direction of the uncoated regional 11a below collector plate 40 and 12a.As described, when sealing wire 49 radially formed, uncoated regional 11a and 12a that each protuberance 43 contact is piled up accordingly were so that electric current can be exported equably by protuberance 43.This prevents that overcurrent from accumulating in the central area.

Tension force is applied to uncoated regional 11a and the 12a in the sweep 19, and therefore, uncoated regional 11a and 12a are with respect to flat 18 closely knit compressing.Because uncoated regional 11a and 12a compress in that sweep is closely knit, so uncoated regional 11a and 12a are firmly and the bending of resisting the place, place.Therefore, when protuberance 43 adheres to uncoated regional 11a and 12a, can prevent because the adhesion property that the bending of uncoated regional 11a and 12a causes descends.When protuberance 43 adhered to uncoated regional 11a and 12a, uncoated regional 11a and 12a and protuberance 43 were stably fixing by laser welding.

At flat 18, uncoated regional 11a and 12a be by closely knit polymerization, and the structure that is used for supporting along side direction do not provide yet, and makes that uncoated regional 11a and 12a and collector plate 40 can't easily be adhered to.Especially, under the situation of lithium rechargable battery, the uncoated regional 11a at flat 18 places and 12a are too thin and can not improve support force fully.Therefore, if the uncoated regional 11a at flat 18 places and 12a are used for supporting collector plate, then need the structure for the uncoated regional 11a of polymerization and 12a.Yet, increases this assembly in this case and can unnecessarily increase the volume of electrode assemblie, thereby the power that reduces per unit volume is exported.

Yet according to this exemplary embodiment, the uncoated regional 11a at curved end place and 12a can provide support power fully, so that collector plate 40 and uncoated regional 11a and 12a combination stably, and ribs 45 can stably support collector plate 40.

Fig. 5 is the decomposition diagram of collector plate and the lead member of first exemplary embodiment according to the present invention.

Referring to Fig. 5, comprise according to the lead member 50 of this exemplary embodiment: be connected to terminal terminal lead part 51, be attached to the afflux lead portion 52 of terminal lead part 51 and collector plate 40 and be inserted into lead-in wire protuberance 53 in the groove 42 at outer surface place of collector plate 40.Protuberance 43 extends towards uncoated regional 11a and 12a, so that groove 42 is formed on the opposition side of protuberance 43.

Lead-in wire protuberance 53 be the approximate half-circular corresponding with groove 42, and is welded to groove 42 when the protuberance 53 that goes between is inserted into groove 42.

As described, when lead-in wire protuberance 53 by the groove 42 that is inserted into collector plate 40 in and with groove 42 in conjunction with the time, can prevent because the contact performance of the lead member 50 that exterior vibration or impact cause and collector plate 40 descends.

Adopt said structure, the electric current that is collected in uncoated regional 11a and 12a place can be delivered to terminal 21 and 22 by collector plate 40 and lead member 50.

Fig. 6 is the sectional perspective view according to collector plate and the lead member of the rechargeable battery of second embodiment of the invention.

Referring to Fig. 6, except the structure of collector plate 60 and lead member 70, have identical structure with rechargeable battery according to first exemplary embodiment according to the rechargeable battery 6 of second embodiment of the invention.Therefore the description that will omit same structure.

Collector plate 60 according to this exemplary embodiment comprises the plate-like portion 66 of the side surface that adheres to electrode assemblie 10 and the ribs 63 of extending from side and the upper end of this plate-like portion 66.

Ribs 63 is arc, and just, the top of plate-like portion 66 is arc.A plurality of protuberances 62 radially prolong and form continuously along the circumference on the top of plate-like portion 66.The top of plate-like portion 66 adheres to the sweep 19 of electrode assemblie 10.Ribs 63 adheres to the outer perimeter of sweep 19, to support collector plate 60.

Each protuberance 62 all radially, and perpendicular to corresponding uncoated regional 11a or 12a below the collector plate.When each collector plate 60 and arrange adjacent with 12a of corresponding uncoated regional 11a, each collector plate 60 and corresponding uncoated regional 11a and 12a weld by the length direction irradiating laser along protuberance 62.

In other words, in the case, the protuberance 62 corresponding uncoated regional 11a of extruding or 12a, to keep with following uncoated regional 11a or 12a is surperficial contacts, and each collector plate 60 is soldered to corresponding uncoated regional 11a or 12a by the length direction irradiating laser along protuberance 62.

The lead member 70 that is welded to collector plate 60 comprises: be connected to terminal terminal lead part 71, be attached to the afflux lead portion 72 of collector plate 60 and be formed on the bottom of afflux lead portion 72 and be attached to the welding rib 73 of ribs 63.

Welding rib 73 has the arcuation cross section, and the shape of welding rib 73 is corresponding with the shape on the top of ribs 63.Therefore, welding rib 73 can adhere to the top side of ribs 63, and welding rib 73 and ribs 63 can be soldered.

As described, when welding rib 73 was attached to the upper end of ribs 63, current path had beeline, minimized thereby power loss and heat are produced.

Because electric current has the characteristic by beeline, so electric current moves through the beeline between terminal and the uncoated zone.As in this exemplary embodiment, collector plate 60 is fixed on the upper end of uncoated regional 11a and 12a, and lead member 70 is fixed to the ribs 63 of the upper end of collector plate 60 so that electric current can move without unnecessary portions.When the distance of passing through when electric current reduces, can reduce or minimize because the power loss that the resistivity of member causes, and can reduce heat and produce.

In addition, because welding rib 73 contact ribs 63 above arcuation, so mechanically prevent along the moving of side direction, prevent thus because the contact performance decline that causes along the vibration of side direction.

Fig. 7 is the electrode assemblie of the 3rd exemplary embodiment according to the present invention and the decomposition diagram of collector plate, and Fig. 8 is the perspective view of collector plate and the lead member of the 3rd exemplary embodiment according to the present invention.

Referring to Fig. 7 and Fig. 8, comprise afflux part 82,82 ', lower header part 83,83 ' and connect upper and lower afflux part 82,82 ' and 83,83 ' connecting rod 85,85 ' according to the collector plate 80,80 ' of this exemplary embodiment.

Collector plate 80,80 ' last afflux part 82,82 ' are welded to the respective side portion of sweep 19 of the upper end of electrode assemblie 10.Last afflux part 82,82 ' can comprise towards corresponding uncoated regional 11a and outstanding protuberance 82a, the 82a ' of 12a.Last afflux part 82,82 ' also can be included in corresponding ribs 82b, the 82b ' of respective side portion of outer perimeter that goes up afflux part 82,82 ' edge and contact the upper end of sweep 19.

Lower header part 83,83 ' is welded to the respective side portion of sweep 19 of the lower end of electrode assemblie 10.Lower header part 83,83 ' can comprise towards corresponding uncoated regional 11a and outstanding protuberance 83a, the 83a ' of 12a.Lower header part 83,83 ' also can be included in corresponding lower header part 83,83 ' edge and contact ribs 83b, the 83b ' of respective side portion of outer perimeter of the lower end of sweep 19.

Last afflux part 82,82 ' upper end and lower header part 83,83 ' lower end are arc.In some embodiments of the invention, last afflux partly can be described as the first or second afflux part, and lower header partly can be described as the another one in first and second affluxs part.

Connecting rod 85,85 ' forms the shape of square pole, and will go up afflux part 82,82 ' and lower header part 83,83 ' electricity and mechanical connection.Described in this exemplary embodiment, when provide afflux part 82,82 ' and lower header part 83,83 ' time, electric current is collected in the upper and lower end of electrode assemblie 10, thereby can prevent from concentrating at the electric current at the end place of uncoated regional 11a and 12a.In addition, because last afflux part 82,82 ' is connected by corresponding connecting rod 85,85 ' with lower header part 83,83 ', so can prevent the performance decline that causes owing to collector plate 80,80 ' vibrations or vibration along the above-below direction of electrode assemblie 10.

The lead member 90 that is welded to collector plate 80 comprises: be connected to terminal terminal lead part 91, be attached to the afflux lead portion 95 of collector plate 80 and connect collector plate lead portion 95 and terminal lead part 91 be connected lead portion 92.Afflux lead portion 95 is welded to the center along its length of connecting rod 85, and therefore, the electric current that accumulates in afflux part 82 and lower header part 83 can evenly be delivered to terminal by lead member 90.When afflux lead portion 95 was set to one of them of more close upper and lower afflux part 82 and 83, because the characteristic of electric current, more electric current can be by one of them transmission of this upper and lower afflux part 82 and 83.Yet according to this exemplary embodiment, afflux lead portion 95 is arranged on central part, so electric current can evenly transmit.

Although in conjunction with being considered to enforceable exemplary embodiment at present disclosure is described, but be understood that, the invention is not restricted to the disclosed embodiments, on the contrary, the invention is intended to cover the various modifications in the spirit and scope that are included in claims and be equal to setting.

Claims (13)

1. rechargeable battery comprises:
Electrode assemblie, this electrode assemblie comprises: first electrode, second electrode, in the uncoated zone of first electrode at the place, end of described first electrode, at the place, end of described second electrode second electrode uncoated zone and the dividing plate described first electrode and described second electrode between relative with the uncoated zone of described first electrode, and described electrode assemblie has curved end and the flat between described curved end;
The housing that holds described electrode assemblie;
Be connected to the cover plate of described housing;
Be electrically connected to described first electrode and be exposed to the first terminal of the outside of described rechargeable battery; And
First collector plate, this first collector plate is electrically connected described first electrode and described the first terminal, and is welded to the uncoated zone of described first electrode at one of them place of the described curved end of described electrode assemblie;
Wherein said first collector plate has the protuberance outstanding towards the uncoated zone of described first electrode;
Wherein said first collector plate has opposite with described protuberance and corresponding groove, and the lead member that is electrically connected described the first terminal and described first collector plate has the lead-in wire protuberance that is arranged in described groove.
2. rechargeable battery according to claim 1, wherein said protuberance is semicircular in shape.
3. rechargeable battery according to claim 2, wherein said protuberance has a plurality of sealing wires, and each described sealing wire prolongs along the radial direction of described semicircular in shape.
4. rechargeable battery according to claim 1, the end of wherein said first collector plate is that arc and described first collector plate have a plurality of protuberances, each described protuberance prolongs along the radial direction of the described end of described first collector plate.
5. rechargeable battery according to claim 1, the end of wherein said first collector plate is arc.
6. rechargeable battery according to claim 1, wherein said first collector plate have the ribs of extending above one of them of the described curved end of described electrode assemblie.
7. rechargeable battery according to claim 6, wherein said ribs is arc, with corresponding to one of them of the described curved end of described electrode assemblie.
8. rechargeable battery according to claim 1, wherein said first collector plate comprises first afflux part at the first end place that is positioned at the uncoated zone of described first electrode and is positioned at the second afflux part at the second end place in the uncoated zone of described first electrode, and described first afflux partly is welded to the described first end in the uncoated zone of described first electrode, and described second afflux partly is welded to the described the second end in the uncoated zone of described first electrode.
9. rechargeable battery according to claim 8, wherein said first afflux part and described second afflux partly are connected by connecting rod.
10. rechargeable battery according to claim 9, the lead member that wherein is electrically connected described the first terminal and described first collector plate is welded to the center along its length of described connecting rod.
11. rechargeable battery according to claim 1, the active material of the positive electrode of wherein said electrode assemblie comprises lithium compound.
12. rechargeable battery according to claim 1, wherein said first collector plate is attached to the uncoated zone of described first electrode by laser welding.
13. rechargeable battery according to claim 1 further comprises second terminal that is electrically connected to described second electrode and is exposed to the outside of described rechargeable battery; With second collector plate that is electrically connected described second electrode and described second terminal.
CN2010101541957A 2009-04-21 2010-04-20 Rechargeable battery having a current collecting plate CN101872870B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020090034674A KR101147171B1 (en) 2009-04-21 2009-04-21 Rechargeable battery
KR10-2009-0034674 2009-04-21

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CN101872870A CN101872870A (en) 2010-10-27
CN101872870B true CN101872870B (en) 2013-09-25

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US (1) US20100266894A1 (en)
EP (1) EP2244328B1 (en)
JP (1) JP5275271B2 (en)
KR (1) KR101147171B1 (en)
CN (1) CN101872870B (en)
AT (1) AT544192T (en)

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US20100266894A1 (en) 2010-10-21

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